Yep, it looks like the above would work for the majority of these.
That's probably Good Enough^tm.

>>> +  (define no-delims
>>> +    (if (string-match delim-regexp no-suffix)
>>> +        (string-split* no-suffix delim*)
>>> +        (git-tag-error 'tag-version-delimiter)))
>>
>> This throws an error if the version doesn't have any delimiter.
>
> Setting the ‘tag-version-delimiter’ prefix to an empty string would
> solve this, right?  Or, maybe we should just get rid of the delimiter
> thing since only a few packages use a different delimiter.

IMO, just get rid of the delimiter.  If we wanted to be *that* flexible,
we could make it so they provide a tag->version proc instead of (prefix,
suffix, delimiter).

--
Sarah